Question

1)find the surface area of remaining solid
2)the volume of remaining solid

Answer 1

remaining area =CSA of cuboid -CSA of cone
=2h (l+b)-pie×r×l
=2×30 (42+20)-22/7×7×25
= 3170cm^2
volume of remaining part = volume of cuboid -volume of cone
=lbh -1/3×pie×r^2×h
=42×20×30-1/3×22/7×7×7×24
= 23968 cm^3